Physiological Changes in Pregnancy

Estratto della scheda di revisione

Course Outline

  1. Blood Volume Changes
  2. Hematological Adaptations
  3. Renal Function in Pregnancy
  4. Respiratory System Changes
  5. Uterine and Breast Changes
  6. Fetal Skull Anatomy
  7. Maternal Pelvis Types
  8. Placental and Blood Flow Anomalies
  9. Pregnancy Complications
  10. Labor and Delivery Mechanics

1. Blood Volume Changes

Key Concepts & Definitions

  • Hemodilution: An increase in plasma volume that dilutes blood components, leading to decreased hemoglobin concentration and hematocrit during pregnancy.
  • Blood Volume Increase: Total blood volume rises by approximately 30-50% in pregnancy, primarily due to increased plasma and red blood cell mass.
  • Physiological Anemia: A normal decrease in hemoglobin concentration during pregnancy caused by hemodilution, not true anemia.
  • Hemodynamic Changes: Increased cardiac output and blood volume, with decreased systemic vascular resistance, facilitating better placental perfusion.
  • Gestational Thrombocytopenia: A mild decrease in platelet count during pregnancy, common and usually asymptomatic.
  • Water Retention: Increased extracellular water retention influenced by estrogen and the renin-angiotensin system, contributing to plasma volume expansion.

Essential Points

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Anteprima del quiz

1. What does the increase in blood volume during pregnancy primarily involve?

2. What is the primary cause of physiological anemia in pregnancy?

3. What is the approximate percentage increase in blood volume during pregnancy?

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Anteprima delle flashcard

Blood volume increase — percentage?

30-50% increase during pregnancy.

Blood volume increase — percentage?

30-50% increase due to plasma and RBC expansion.

Hemodilution — effect?

Decreases hemoglobin and hematocrit levels.

Hemodilution — effect?

Dilutes blood components, lowers hemoglobin/hematocrit.

Renal GFR — change in pregnancy?

Increases by about 50% to support fetal needs.

Physiological anemia — cause?

Normal dilution, not true anemia.

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Domande frequenti

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